Universal coupling



P. A.vFrsKER.

UNIVERSAL couPLlKNG. APPLHIATIONl FILED OCT- 30. |918.

' Patented Feb. 24,1920.

ends of the springs,

PATENT oFFioE.

FEDER ANDERSEN FISKER, 0F FREDERIKSBERG, NEAR PENHAGEN, DENMARK.

UNIVERSAL coUPLING.

Specification of Letters Patent.

Patented Feb. 2,4, 1920.

Application led October 30, 1918. Serial No. 260,326.

To all whom t may concern.;

Be it known that I, PEDER ANpEnsEv FISKER, manufacturer, subject of theKingdom of Denmark, residing at No. 30 Peder Bangsvy, Frederiksberg,near Copenhagen, Denmark, have invented certain new and usefulImprovements in Universal Couplings, of which the following is aspecification.

This invention relates to universal couplings, and more particularly tocouplings in which the connecting means for the shaft ends comprise coilsprings.

A feature of this invention is the provision of a ball-and-socket joint,approximately midway of the distance between the shafts in its movementrelative to the other shaft.

Another feature is the provision of ajoint'v nf the above-describedcharacter which also permits one of the shafts to move longitudinallyforward or away from the other shaft.

Still another feature is the provision of improved means for mountingthe springs on the shaft-ends.

The drawing illustrates one manner of constructing the invention.

Figure 1 shows the coupling in side-elevation and partly in section.

a cross-section of the spring .indicate in Fig. 1.

gig. 3 one of the shafts in end-elevation,I an l Fig. 4 a modifiedmanner of guiding the shafts relatively to one another.

1 and 2 are the two shaft ends lconnected with one another by means ofthe universal coupling. provided collars or flanges 3 and 4 betweenwhich the members constituting the coupling are disposed. The connectingmember between the shaft ends 1 and 2 is formed by two or more springs 5of uniform size and shape, (only one of which is shown,

screwed into each other and ordinarily, at-

tached to the shaft ends at uniform angu-4 larintervals equaling 360divided by the number of springs. In the construction shown in Fig. 1there are supposed to be used two or four springs formed by helicallywound as shown in Fig. 2 and fitted at both ends with lugs 6 and 7 bentso as to become parallel with the axis of the coupling when the forguiding one of the At the two shaft ends there are spring-steel of ahcross-section.

springs are placed between the shaft ends, so that the lugs may beattached to the shaft ends by being inserted in notches 8 and 9 on thetwo collars. The more springs 5 there are used, the more the power to betransmitted through the coupling will be distributed on the springs andconsequently, on a larger number of notches 8 and 9.

The springs 5 screwed into each other not only allow the shaft ends 1and 2 to form a slight angle with one another, and to revolve throughsmall angles relatively to one another but, unless the shafts are guidedrelatively to one another to permit rotation only, they also allow theshafts l and 2 to be moved somewhat parallel to one another mit from thedriven shaft, the moreor less pulsative motion producedl by the engineinto a uniform .steady revolution of the driven' shaft.

In the construction shown, the shaft ends are guided relatively'to oneanother by one shaft end 2 with a spherical surface 11 provided on a pin10 extending into a cylindrical borel 12 in the shaft end 1, whereby theshafts are guided in their relative posi# tion, both in case they aremoved axially and in case they are angularly displaced in relation toone another.

By 4for the shafts relatively to one another, the spherical surface 11is more or less inclosed by a spherical seat located in a bore partlycorresponding to the bore 12.

The joint 114-12 is preferably located approximately midway of thedistance between the collars or flanges 3, 4L and thus vthe ends of thesprings.

The guiding of the shafts relatively to one another and the manner ofattaching the spring ends to the shafts may be varie widely, withoutdeviation from the main principle underlying the present invention,viz., the use o-f a number'of alike springs screwed into each other.

I claim: v

l. In a universal shaft coupling, anges secured to the adjacent ends ofthe shafts to be coupled; members secured to and extending from each ofsaid flanges, one of said members being provided with a ball and theother of said members being provided with a socket for said ball, saidsocket being elon- A gated to permit said members to move .t0- "wardeach other; and coil springs having their opposite ends secured toopposite flanges to connect said flanges for rotation of one by theother.

In a universal shaft coupling, flanges secured to the adjacent ends ofthe shafts to be coupled; members extending toward eachother and fromeach of said flanges and a universal joint connecting said members at apoint virtuallymidway of said flanges; and coil springs having theiropposite ends secured to opposite flanges to con- A neet said liangesfor rotation of one by the other.

3. In a universal shaft coupling, heads secured to the adjacent ends ofthe shafts to be coupled; members extending toward each other and fromeach of said heads; and

llat springs connecting saidv heads for rotation of one by the other,said heads having peripheral ends of said spring.

4. In combination, a pair of separate shafts the ends of which areadjacent each other; a separate head formed integral with each of saidadjacent ends; a ball carried by one of` said heads; a socket providedin the other head and into which the ball projects, said heads beingspaced and said ball and-socket joint being located virtually midway ofsaidspace; and a spring located in said space between said heads andhaving v its opposite ends secured tothe opposite head,

for rotating one `of said heads and shafts by the other.

In testimony whereof I aiix my signature.

PEDER ANDERSEN FISKER.

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